US3299771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter for pinhole detectors
Assignee: General Electric Co
•
Filing: 1963-05-17
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Granted: 1967-01-24
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Paul W Caulier
- 👤 Dixon Corbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/8901; G01N21/892; G01N21/894
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN APPARATUS FOR INSPECTING STRIP MATERIAL THAT MOVES ALONG A PATH, IMPROVED SHUTTERS FOR PREVENTING STRAY LIGHT FROM PASSING AROUND THE EDGES OF SAID MATERIAL, EACH SHUTTER COMPRISING AN UPPER PLATE AND A LOWER PLATE ARRANGED TO FORM A SUBSTANTIALLY U-SHAPED THROAT FOR RECEIVING AN EDGE OF SAID MATERIAL IN SAID PATH AT THE CORRESPONDING OPEN ENDS OF SAID PLATES, SAID UPPER AND LOWER PLATES HAVING RESPECTIVE SLITS THERETHROUGH THAT EXTEND IN FROM SAID OPEN ENDS IN THE SAME DIRECTION, AT LEAST ONE LIGHT OBSTRUCTING VANE EXTENDING ACROSS SAID SLIT IN SAID UPPER PLATE, AT LEAST ONE LIGHT OBSTRUCTING VANE EXTENDING ACROSS SAID SLIT IN AID LIGHT OBSTRUCTING LOWER PLATE, SAID VANES LYING IN PLANES WHICH ARE SUBSTANTIALLY PERPENDICULAR TO SAID THROAT, AND A LIGHT TRAP FORMED OF A CHAMBER FASTENED TO ONE OF SAID PLATES AT THE SURFACE AWAY FROM SAID THROAT, SAID CHAMBER OPENING INTO SAID THROAT FOR TRAPPING STRAY LIGHT.
Claim 2
Dependent Claim
153 words
IN APPARATUS FOR INSPECTING STRIP MATERIAL THAT MOVES ALONG A PATH, IMPROVED SHUTTERS FOR PREVENTING STRAY LIGHT FROM PASSING AROUND THE EDGES OF SAID MATERIAL, EACH SHUTTER COMPRISING AN UPPER PLATE AND A LOWER PLATE ARRANGED TO FORM A SUBSTANTIALLY U-SHAPED THROAT FOR RECEIVING AN EDGE OF SAID MATERIAL IN SAID PATH AT THE CORRESPONDING OPEN ENDS OF SAID PLATES, SAID UPPER AND LOWER PLATES HAVING RESPECTIVE SLITS THERETHROUGH THAT EXTEND IN FROM SAID OPEN ENDS IN THE SAME DIRECTION, AT LEAST ONE LIGHT OBSTRUCTING VANE EXTENDING ACROSS SAID SLIT IN SAID UPPER PLATE, AT LEAST ONE LIGHT OBSTRUCTING VANE EXTENDING ACROSS SAID SLIT IN AID LIGHT OBSTRUCTING LOWER PLATE, SAID VANES LYING IN PLANES WHICH ARE SUBSTANTIALLY PERPENDICULAR TO SAID THROAT, AND A LIGHT TRAP FORMED OF A CHAMBER FASTENED TO ONE OF SAID PLATES AT THE SURFACE AWAY FROM SAID THROAT, SAID CHAMBER OPENING INTO SAID THROAT FOR TRAPPING STRAY LIGHT.
References Cited (Backward Citations)
US2979984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |